@inproceedings{41377, author = {{Decius, Julian and Schaper, Niclas and Seifert, Andreas}}, booktitle = {{JURE Congress}}, location = {{Antwerpen}}, title = {{{The Role of Informal Learning as a Mediator Between Learning Culture and Work-Related Learning Outcomes.}}}, year = {{2018}}, } @inproceedings{41378, author = {{Decius, Julian and Schaper, Niclas and Seifert, Andreas}}, booktitle = {{EARLI SIG 14 Conference}}, location = {{Genf}}, title = {{{Personal and Organizational Antecedents of Informal Learning in the Workplace.}}}, year = {{2018}}, } @inproceedings{41380, author = {{Seifert, Andreas}}, booktitle = {{Arbeitsgruppe der Didaktik der Physik}}, location = {{Paderborn}}, title = {{{Aspekte bildungswissenschaftlicher Kompetenz. Ansätze, Ergebnisse, Implikationen.}}}, year = {{2018}}, } @article{25912, abstract = {{It is possible to infiltrate a guest species selectively in one pore system of bimodal mesoporous CMK-5 carbon by an optimized nanocasting procedure. The selective filling has a drastic impact on the low-angle X-ray diffraction pattern of this novel class of materials. The structures of CMK-5, CMK-5 composite materials (sulfur and SnO2 as guest species), and CMK-3 carbon were simulated to investigate the influence of the pore filling with different guest species on the diffraction pattern and compared with experimental results. Additionally, the impact of structural defects is taken into account. The nature of the guest species strongly influences the relative intensity of the diffraction peaks. It turns out that the diffraction patterns of sulfur-carbon composite materials are nearly identical as those of CMK-3 carbon, which is attributed to a similar electron density of carbon and sulfur. Thus, sulfur is an ideal guest species to investigate the selective pore filling in CMK-5 carbon.}}, author = {{Weinberger, Christian and Hartmann, Marc and Ren, Sai and Sandberg, Thomas and Smått, Jan-Henrik and Tiemann, Michael}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{24--31}}, title = {{{Selective pore filling of mesoporous CMK-5 carbon studied by XRD: Comparison between theoretical simulations and experimental results}}}, doi = {{10.1016/j.micromeso.2018.02.035}}, year = {{2018}}, } @article{25910, abstract = {{We describe the synthesis of mesoporous Al2O3 and MgO layers on silicon wafer substrates by using poly(dimethylacrylamide) hydrogels as porogenic matrices. Hydrogel films are prepared by spreading the polymer through spin-coating, followed by photo-cross-linking and anchoring to the substrate surface. The metal oxides are obtained by swelling the hydrogels in the respective metal nitrate solutions and subsequent thermal conversion. Combustion of the hydrogel results in mesoporous metal oxide layers with thicknesses in the μm range and high specific surface areas up to 558 m2∙g−1. Materials are characterized by SEM, FIB ablation, EDX, and Kr physisorption porosimetry.}}, author = {{Chen, Zimei and Kuckling, Dirk and Tiemann, Michael}}, issn = {{2079-4991}}, journal = {{Nanomaterials}}, title = {{{Porous Aluminum Oxide and Magnesium Oxide Films Using Organic Hydrogels as Structure Matrices}}}, doi = {{10.3390/nano8040186}}, year = {{2018}}, } @article{25913, abstract = {{Ordered mesoporous CMK-5 carbon exhibits two distinct pore systems that can be modified individually. This work demonstrates how one of the pore systems can be selectively filled with elemental sulfur, while the other pore system remains empty. The resulting sulfur–carbon composite material with high residual porosity can be used as the cathode material in lithium–sulfur battery cells. We present a systematic investigation of the loading of CMK-5 carbon with variable relative amounts of sulfur and compare the results to the preparation of SnO2 (as well as TiO2, Mn2O3/Mn3O4, NiO) nanoparticle-loaded CMK-5 carbon.}}, author = {{Weinberger, Christian and Ren, Sai and Hartmann, Marc and Wagner, Thorsten and Karaman, Didem. Ş. and Rosenholm, Jessica M. and Tiemann, Michael}}, issn = {{2574-0970}}, journal = {{ACS Applied Nano Materials}}, pages = {{455--462}}, title = {{{Bimodal Mesoporous CMK-5 Carbon: Selective Pore Filling with Sulfur and SnO2 for Lithium Battery Electrodes}}}, doi = {{10.1021/acsanm.7b00307}}, year = {{2018}}, } @article{25909, abstract = {{Organic polymer-hydrogels are known to be capable of directing the nucleation and growth of inorganic materials, such as silica, metal oxides, apatite or metal chalcogenides. This approach can be exploited in the synthesis of materials that exhibit defined nanoporosity. When the organic polymer-based hydrogel is incorporated in the inorganic product, a composite is formed from which the organic component may be selectively removed, yielding nanopores in the inorganic product. Such porogenic impact resembles the concept of using soft or hard templates for porous materials. This micro-review provides a survey of select examples from the literature.}}, author = {{Weinberger, Christian and Kuckling, Dirk and Tiemann, Michael}}, issn = {{2310-2861}}, journal = {{Gels}}, title = {{{Hydrogels as Porogens for Nanoporous Inorganic Materials}}}, doi = {{10.3390/gels4040083}}, year = {{2018}}, } @inproceedings{21457, abstract = {{This paper presents the finite element model developed for the simulation of pipe elbow production by the so-called ‘Hamburg process’ in order to improve productivity and resource efficiency. To optimize the tooling design, a sensitivity analysis of the tool parameters that influence the quality of pipe elbows, such as mandrel height and length, is conducted. Different materials data sets including damage models were considered. Using numerical simulations, it is possible to determine an optimized tool geometry for the production of specific pipe elbow dimensions. Furthermore, as a result of the experiments and numerical simulations conducted, it is possible to increase the production velocity of the serial plant. Along with deformation, damage models are included in simulations in order to identify the right process boundaries. Finally, an experimentally validated model is developed for increasing resource efficiency in pipe elbow fabrication.}}, author = {{Diekmann, Uwe and Homberg, Werner and Prehm, Jens and Rostek, Tim and Schönhoff, Nils and Tabakajew, Dmitri and Trasca, Andreea and Uysal, Haris}}, booktitle = {{Materials Science Forum}}, issn = {{1662-9752}}, pages = {{159--164}}, publisher = {{Trans Tech Publications Ltd}}, title = {{{Optimization of Tooling Design for Hot Mandrel Bending of Pipe Elbows}}}, doi = {{10.4028/www.scientific.net/msf.918.159}}, volume = {{918}}, year = {{2018}}, } @inproceedings{21458, author = {{Rostek, Tim and Homberg, Werner}}, booktitle = {{AIP Conference Proceedings 1960, 100013}}, number = {{1}}, publisher = {{AIP Publishing}}, title = {{{Grading Technologies for the Tanufacture of Innovative Cutting Blades}}}, doi = {{10.1063/1.5034953}}, volume = {{1960}}, year = {{2018}}, } @inproceedings{21465, author = {{Homberg, Werner and Rostek, Tim and Schaper, Mirko and Grydin, Olexandr and Andreiev, Anatolii and Brosius, Alexander and Guilleaume, Christina}}, issn = {{2366-4061}}, pages = {{28--33}}, publisher = {{Universität Paderborn}}, title = {{{Hybride Verbundstrukturen aus Aluminium und Titan für Leichtbauanwendungen}}}, year = {{2018}}, } @inproceedings{22438, abstract = {{Neue Konstruktionsabläufe und Potentiale bei der Gestaltung additiv hergestellter Bauteile verlangen insbesondere im Konstruktionsprozess ein Umdenken. Fehlende Kenntnisse über die additive Fertigungstechnologie hemmen zusätzlich dieses Umdenken [HHD06, WC15]. Um die verhältnismäßig neue Fertigungstechnologie zugänglicher zu machen, wurden in den letzten Jahren verschiedene Konstruktionsempfehlungen erarbeitet. Die Vielzahl an Empfehlungen erschwert dem Konstrukteur allerdings einen entsprechenden Überblick zu behalten und für ihn relevante von nicht relevanten Empfehlungen zu sondieren. Aus diesem Grund wurden öffentlich zugängliche Empfehlungen für das Laser-Strahlschmelzen zusammengetragen und einer Priorisierung unterzogen. Das Ergebnis beinhaltet Konstruktionsempfehlungen, die einen relevanten Einfluss auf die Bauteilfertigung, die Bauteilqualität und -funktion haben. Durch Abstraktion dieser Empfehlungen konnten Richtlinien erarbeitet werden, die für eine softwareseitige Gestaltprüfung verwendet werden können. Durch diese Gestaltprüfung können Bauteile beliebiger Komplexität, zum Beispiel feine Gitter oder topologieoptimierte Strukturen, bereits vor der Fertigung hinsichtlich der Einhaltung relevanter Konstruktionsrichtlinien überprüft werden. Der Gestaltprüfer greift dabei auf eine Datenbank zurück, die zulässige, quantitative Grenzwerte von Konstruktionsrichtlinien enthält. Diese Grenzwerte werden im Folgenden Attributsausprägungen genannt und können experimentell ermittelt werden. Hierfür wurden standardisierte Prüfkörperbaujobs entwickelt, die alle notwendigen Prüfkörper zur Ermittlung der Attributsausprägungen enthalten und deren Auswertung eine Erweiterung der Datenbank hinsichtlich}}, author = {{Lammers, Stefan and Tominski, Johannes and Magerkohl, Sebastian and Künneke, Thomas and Lieneke, Tobias and Zimmer, Detmar}}, booktitle = {{Proceedings of the 15th Rapid.Tech Conference}}, isbn = {{978-3-446-45812-3}}, pages = {{81--94}}, title = {{{Konstruktionsrichtlinien für eine softwaregestützte Anpassung von additiv gefertigten Bauteilen im Hinblick auf eine robuste Fertigung}}}, doi = {{https://doi.org/10.3139/9783446458123.005}}, year = {{2018}}, } @inproceedings{22431, abstract = {{The design of additively manufactured components requires a rethinking in the design process. This is inhibited by a lack of knowledge about additive manufacturing technologies. For this reason, a large number of design guidelines have been developed in recent years. In their present form the design guidelines are not suitable for processing in a software algorithm, since the guidelines have a certain redundancy and partly influence each other. This paper describes several steps to consolidate the existing guidelines and to prepare them in a way that they can be used in a software algorithm for a design check. Therefore, existing guidelines are collected, prioritized and quantified with regard to their relevance for a robust production. To quantify the guidelines, test specimens are developed, produced and evaluated in order to obtain a limit value for the geometric properties. With these limit values, quantifiable design guidelines can be applied to designers and software tools.}}, author = {{Lammers, Stefan and Tominski, Johannes and Magerkohl, Sebastian and Lieneke, Tobias and Künneke, Thomas and Zimmer, Detmar}}, booktitle = {{29th Annual International Solid Freeform Fabrication Symposium}}, title = {{{Design Guidelines for a Software-supported Adaptation of Additively Manufactured Components with Regard to a Robust Production}}}, doi = {{http://utw10945.utweb.utexas.edu/sites/default/files/2018/046%20DesignGuidelinesforaSoftwareSupportedAdaptat.pdf}}, volume = {{29}}, year = {{2018}}, } @inbook{44475, author = {{Eckel, Julia}}, booktitle = {{Exploring the Selfie – Historical, Theoretical, and Analytical Approaches to Digital Self-Photography}}, editor = {{Eckel, Julia and Ruchatz, Jens and Wirth, Sabine}}, pages = {{131--166}}, publisher = {{Palgrave Macmillan}}, title = {{{Selfies and Authorship – On the Displayed Authorship and the Author Function of the Selfie}}}, year = {{2018}}, } @inbook{44474, author = {{Eckel, Julia and Ruchatz, Jens and Wirth, Sabine}}, booktitle = {{Exploring the Selfie – Historical, Theoretical, and Analytical Approaches to Digital Self-Photography}}, editor = {{Eckel, Julia}}, pages = {{1--24}}, publisher = {{Palgrave Macmillan}}, title = {{{The Selfie as Image (and) Practice – Approaching Digital Self-Photography}}}, year = {{2018}}, } @article{15067, author = {{Wiens, Eugen and Homberg, Werner}}, issn = {{2261-236X}}, journal = {{MATEC Web of Conferences}}, location = {{Bremen}}, title = {{{Internal Flow-Turning – extended manufacturing possibilities in tailored tube production}}}, doi = {{10.1051/matecconf/201819011002}}, year = {{2018}}, } @article{41528, author = {{Engelkemeier, Katja and Mücke, Christian and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{2522-0128}}, journal = {{Advanced Composites and Hybrid Materials}}, keywords = {{Materials Chemistry, Polymers and Plastics, Materials Science (miscellaneous), Ceramics and Composites}}, number = {{1}}, pages = {{189--199}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Anodizing of electrolytically galvanized steel surfaces for improved interface properties in fiber metal laminates}}}, doi = {{10.1007/s42114-018-0071-0}}, volume = {{2}}, year = {{2018}}, } @article{41527, author = {{Engelkemeier, Katja and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{0167-577X}}, journal = {{Materials Letters}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}}, pages = {{752--756}}, publisher = {{Elsevier BV}}, title = {{{Influence of sp3/sp2-carbon ratio of vertically standing carbon nanostructures produced by pulsed laser-treatment on PAN-based carbon fibers}}}, doi = {{10.1016/j.matlet.2018.11.041}}, volume = {{236}}, year = {{2018}}, } @article{24107, author = {{Engelkemeier, Katja and Mücke, Christian and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{2522-0128}}, journal = {{Advanced Composites and Hybrid Materials}}, pages = {{189--199}}, title = {{{Anodizing of electrolytically galvanized steel surfaces for improved interface properties in fiber metal laminates}}}, doi = {{10.1007/s42114-018-0071-0}}, year = {{2018}}, } @article{24106, author = {{Engelkemeier, Katja and Hoyer, Kay-Peter and Schaper, Mirko}}, issn = {{0167-577X}}, journal = {{Materials Letters}}, pages = {{752--756}}, title = {{{Influence of sp3/sp2-carbon ratio of vertically standing carbon nanostructures produced by pulsed laser-treatment on PAN-based carbon fibers}}}, doi = {{10.1016/j.matlet.2018.11.041}}, year = {{2018}}, } @article{15958, author = {{Zinn, Carolin and Bobbert, Mathias and Dammann, Christian and Wang, Zheng and Tröster, Thomas and Mahnken, Rolf and Meschut, Gerson and Schaper, Mirko}}, issn = {{1359-8368}}, journal = {{Composites Part B: Engineering}}, pages = {{173--185}}, title = {{{Shear strength and failure behaviour of laser nano-structured and conventionally pre-treated interfaces in intrinsically manufactured CFRP-steel hybrids}}}, doi = {{10.1016/j.compositesb.2018.05.030}}, year = {{2018}}, }